PPC_MSGCLR 57 arch/powerpc/include/asm/dbell.h __asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGCLR(%1), PPC_MSGCLRP(%1), %0) PPC_MSGCLR 245 arch/powerpc/platforms/powernv/smp.c asm volatile(PPC_MSGCLR(%0) : : "r" (msg));